Spark-plug.



H. W. MORETON.

SP AHKPLUG. APPLICATiON FILED AUG-20, 1914- BENEWED JAN. 18, I918- Patentefi Mar. 12, 1918.

NM mm.

win moose HEN H. hIORETGN, GI! Y P013351, .hl'ElR YORK, ASSIGNGR, BY Kl-EIESNE ASSKGNMENTS,

T0 MQBETON CARBURETER 001%?0EATION,

NEW 201311.. Y

OF NEW YER-K, N.

Specification of Letters Fatent.

Patented i2, M3 18.

' Application filed August 20, 1911s, Serial 330. 357,697. Renewed January 18, 191E. Serial 15o. 212,534..

To all whom it may concern:

Be it. known that I, HENRY H. Monnrou, a citizentyof the United States, residing at Stony Point, in the county of Rockland and State of New York, have invented new and useful Improvements in Spark-Plugs, of

which the following is a specification.

This invention relates'to a sparking device capable of use for ignition urposes, or in connection with any" form OI apparatus which, in operation, requires the passing of an electric spark between separated terminals.

One of the objects of the invention is to provide a device of the character mentioned which will be simple in construction and efficient in operation as an ignition device for explosive engines, and the like. A further object is to provide means for increasing the number of sparking points without decreasing the intensity of the current at any of the sparking terminals, and without necessitating an increase in current (701112.111- tain the same. A further object is. to provide a sparking device in which one of the sparking terminals is provided with means havin a more or less condenser-like action, wherel y an intense spark is obtained.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawing:

Figure 1 is a side elevation of a simple form of spark plug embodying my invention. Fig. 2 is a side elevation of the modified form. Fig. 3 is a longitudinal sectional view of a second modification.

Referring to the drawing, 10 designates an insulating block of any suitable material,

- 1 opening in the we, of

terminal of an electric conductor leading! 34 to the bushing. Thus ignition of the em from any suitable source of electricity, in, a manner well"known,in the art. The msulating block iscarried by a supportin bushing 15, in any suitable manner, said bushingbelngthreadediat 16, to-permit it toremova'bly engagea correspondingly threaded,

" an engine. or the like;

a nut 17 engaging the threadsiS edge of v the terminal 12,

The insulating block is held in position by of the bushing 15. Secured in the inner the bushing 15 is a wire 19 a bent end, the extremity of which is provided with an enlarged or spherical portion 20 opposite and cooperating with the latter to form the usual spark gap.

in operation the plug is connected with the engine in the manner well understood in the art, and the current will flow through conductor mine-ls l2 and .20 and through the bushing 16 to ground. By providingthe spherical portion 20, the grounded conductor more readily assimilates or absorbs the electric current passing from the terminal '12, thereby increasing the intensity or pressure pass 6 mg from said terminal 12, thus producing an intense rich spark .suflicient to insure ignition under all conditions.

In Fig. 2 l have shown a modification which consists in supporting an insulating block 25 in a bushing 26, and retaining it in position, by means of a plug 27, in the usual and well known manner. The lower end of the insulating block is of petticoat formation as indicated at 28, the conductor 29 extending through the insulator to form a sparking terminal. The lower end of the petticoat portion. 28 is provided with. an external annular groove 30 to receive a" coiled wire 31, one extremity of which bent inwardly as indicated at 32 andis provided with a spherical extremity 33 c0- operating with the conductor 29 to form a spark gap. The other extremity is bent outwar ly as indicated at 34 and terminates a sullicient distance from the edge of bushing 26 to form a spark gap. Extending from the inner edge of the bushing 26 is an electrode 35. In operaticn'the wire 31 engages the groove 30 with sufiicient friction to normally prevent relat ve' rotatipn, but yet permitting such rotation for purposes of adjustment. 1 The current passing from the terminal 29 jumps the gap to the termmal 33 and passing through the wire 31 again jinnps the gap from the extremity plosive mixture within an engine is assured by reason of the double sparkle at the 'two extremities of the wire 31, which for convenience,

I i will term a.br1dge meme. per. ,The terminal 35 isnormal yla sufi' cient distance from 'th fi'iiridge member :22, a. ooaroae'rrosi'or v across the gap between the terice to prevent e spark from jumping thereto a hough it is obvious that should the gap at 8 k be interrupted for any reason, the could then jump to the terminal 35 and. the double spark be thereby secured. Ur if desired, the bridge member may be rotated. so as to bring the terminal near the terminal 35 so that the spark will jump to said terminal 35. If it is desired to eliminate the double sparking the terminal 3i is'brought into contact with the terminal 35, and the plug will then operate in the same manner. as the form illustrated in Fig. 1.

The modification. in Fig. 3 employs the same form or insulating block supporting ybushing 26 and securing plug 27, the insulating block being also provided with/the petticQatQS. In ner end of the central conductor a0 is b into a ring-likc form as indicated Supported by the inner end of the insulating member 25 is a bridge member l2 provided with inwardly extended fingers 4.3, the extremities of which are made spherical as indicated at 44. The spherical ends at are located between. the ring-like portion 41 and electrodes l5 secured to the bushing 26. By

this arrangement a double spark is secured,

the current passing from the ringlike por tion of conductor 4-0 to. either or both of the 'spherical portions i4; and from thence to either of the terminals, thereby obtaining a spark at each gap. The bridge member 4-2 is rotatable to permit of adjustment of the electrodes 44 and 45.

Having thus explained the nature of my invention, and described an operative manner of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what I claim is 1. An improvement in spark plugs comprising an insulating block, means for sup porting the same, a central. electrode extended through said block and having asparking terminal, a grounded electrode, and a bridge member having an attaching portion encircling said insulating block, and provided with sparking terminals coiiperating respectively with the terminal of the central electrode and with the grounded electrode, said bridge member being rotatable on said insulating block, whereby the same may be trode to vary the gap.

2. An improvement'm spark plugs com Ming said insulating block, and provided this form, however, the in with sparking terminals, interposed be.- tween the terminal of the central electrode and the grounded terminal, said bridge member being rotatable, whereby it may be adjusted with respect to said grounded. electrode to vary the gap, said bridge member and said central electrode being relatively shaped to maintain a uniform spark gap irrespective of such adjustment.

3. An improvement in spark plugs comprising an insulating block, means for supporting the same, a central electrode extended through said block and having a sparking terminal, a grounded electrode, and abridge member having an attaching portion encirclingthe insulating block and rotatably supported, whereby it may be adjusted with re-.

spect to said grounded electrode to vary the gap, said bridge member having a radially disposed angular arm the end of which terminates opposite to and is concentric with the terminal of the central electrode to maintain a uniform spark gap irrespective of the adjustment of said bridge member.

l. An improvement in spark plugs comprising an insulating block, means for supporting the same, a central electrode extended through said block and having a spark ing terminal, a grounded electrode, and a bridge member having an attaching portion encircling said insulating block and rota-- table thereon, said bridge member having a radially disposed arm terminating in an angular portion forming a spark gap between the arm and the supporting means, said arm being adjustable by rotation of said bridge member with respect to said grounded electrode, said bridge member and said central electrode being relatively shaped to maintain a uniform spark gap irrespective of such adjustment.

5. An improvement in spark plugs-comprising an insulating block, means for supporting the same, a central electrode extending through sa1d block and having a sparking terminal, a grounded electrode, and a bridge member cons1stmg of a wire coiled around said insulatin block and having its ends shaped to provide sparking terminals, cooperating respectively with the terminal of the central electrode and with the grounded electrode, said bridge member being rotatable on said insulating block, whereby the 1 samemay be adjusted with respect to said adjusted with respect to said grounded elecgrounded electrode to vary the gap. In testimonywhereof I have hereunto set my hand in presence of two subscribing Witnesses. 1 p HENRY H. MORETON; Witnesses: I

EDWARD D. Knrismin, as} mma 

